Intermediate
Have a few programs or modules under your belt? Stumped? Post it in this intermediate forum -- "Intermediate" on PerlGuru means that you have programmed with Perl for at least 6-12 months.

Advanced
Programmed heavily with Perl for long, long, time? Use or write modules where appropriate, use -w and strict in all of your programs, maintain tidy namespaces, and research before you ask questions? (Hint: Using CGI.pm for one or two functions is not advanced.)
Then this is the forum for you.

mod_perl
People with just a cursory knowledge of mod_perl will tell you that mod_perl is simply faster CGI. Although this is certainly a benefit of the interface, it is hardly its most interesting or powerful facet. mod_perl offers a Perl interface to the Apache API. Before mod_perl, the only way to extend or interface with Apache was to write C extension modules, which, while offering high performance, made creating full-scale Web applications difficult.